Automatic dumping-elevator.



No. 747,071. PATENTED DEC. 15, 1903.

W. H. HULTGREN. AUTOMATIC DUMPING ELEVATOR.

APPLIOATION I'I LED FEB. 9. 1903. N0 MODEL. 2 SHEETS-SHBBT 1.

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No. 747,071. PA TENTED DEC. 15, 1903. W. H. HULTGREN.

AUTOMATIC DUMPING ELEVATOR.

APPLICATION FILED FEB. 9. 1903. I

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Patented fiecemher 15, 1903".

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WILLIAM H. HULTGREN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE OTIS ELEVATOR COMPANY, A CORPORATION OF NEW JERSEY.

AUTOMATIC DUMPING ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 747,071, dated December 15, 1903.

Application filed'liebruary 9, 1903. Serial No. 142,465. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM H. I-IULT- GREN, of the city and county of Philadelphia, State of Pennsylvania, have invented an Improvementin Automatic Dumping-Elevators,

of which the following is a specification.

My invention has reference to automatic dumping-elevators; and it consists of certain improvements fully set forth in the following IO specification and shown in theaccompanying drawings, which form a part thereof.

The object of my invention is to provide a construction of elevator which shall receive and lift the load to a definite height and then automatically discharge it when the said oporation is accomplished by means of a tilting support or bucket.

In carrying out my invention I provide the elevator-cage wit-h a bucket pivoted in such manner as to normally remain upright and having a projecting part and combine therewith an obstructionin the path of the bucket adapted to engage its projecting part and cause such bucket to be tilted to automatically discharge the contents, the parts being so organized that the descent of the cage and its bucket causes the latter to again right itself. In connection with the tilting bucket above specified I employ a stop to limit the rocking of the bucket in one direction and a lock to hold the bucket in an upright position engaging the guide for the cage and adapted to release the bucket only when it reaches a notched portion of said guide.

My invention also comprehends other features of construction, which, together with those above referred to, will be better understood by reference to the drawings, in which- Figure 1 is a side elevation of an elevator embodying my invention. Fig. 2 is a front elevation of the cage and a portion of the guides and dumping devices. Fig. 3 is a side elevation of same with the front guide removed, and Fig. 4 is a cross-section on line A 4 of Fig. 2.

A represents the "IF-shaped guides between which the cage B is guided, said result being secured by grooved guides N, secured to the sides of the cage. The cage is raised and lowered by cables 0, which pass a sheave D l at the top and lead to the hoisting mechanism E.

F is a large bucket pivoted to the sides of the cage B on horizontal trunnions G, which are so located relatively to the center of gravity of the loaded bucket as to cause an excess of weight to be upon the rear part F and normally cause the bucket to remain in an upright position when sojplaced. Stops H are secured to the forward and upper part of the bucket to limit the backward movement thereof in the cage, said stops striking against the front faces of the side uprights thereof; The bucket is also provided with one or more looks I, secured to its sides, extending rearwardly through the notched flanges Z; of the uprights of the cage and having lateral ends 2', which hook over the guides A to prevent the forward tilting of the bucket except at the proper place. The place at which such tilting of the bucket may take effect is governed by a notch or notches P in the upright guides A. At such place the bucket may be tilted and dumpitscontentsintothechuteM. Tocause the automatic tilting of the bucket at the proper time, I provide the following devices: To the forward and lower parts of the sides of the bucket I secure grooved guides J, and secured to elevator-frame L, I arrange one or more pins or rollers K. As the cage is elevated the grooved parts J meet and receive the rollers K, with the result that the engagement causes a downward pressure upon said parts J, while the rising of the cage and tru unions G causes the bucket to be tilted. This action is permitted at this place because 'the guides A are notched, as at P, at this place,

tions J are preferably made curved and present upwardly-directed sockets into which the pins or rollers K pass, the curvature acting to cause the tilting of the bucket to take place uniformly. The groove presents two wallsnamely, an upper and lower onethe latter acting to cause the bucket to be tilted and the former acting to right the bucket after dumping. The upper wall is longer than the lower wall for the purpose of causing it to extend beyond the roller or pin K after the bucket is tilted, as shown in dotted lines, Fig. 1, so that it may rest upon said pin or roller and right the bucket as the cage B descends. By examining Fig. 3 it will be" seen that the roller K just clears the upper part of the grooved part J when the bucket is upright; but the lower part extends beyond the roller or pin. The reverse of this is the condition which results from the tilting of the bucket, as evidenced by dotted lines in Fig. 1.

I do not confine myself to the specific construction of the various parts shown, as it is evident that they may be varied While maintaining the principles of myinvention-as, for instance, the tilting bucket may be in form of a tilting platform or support. It is also evident that the looks I may be omitted, if desired, or the locking features may be accomplished in many other ways, if so desired.

The constructions shown are designed to illustrate a type of my invention such as I have found excellently adapted in commercial use, and while I prefer said construction I do not confine myself to the details thereof, as they may be modified without departing from the spirit of my invention.

Having now described my invention,what Iclaim as new, and desire to secure by Letters Patent, is-

1. In an elevator, the combination of upright guides, a cage, hoisting devices for raising and lowering the cage, a bucket pivoted to the cage, and means for automatically tilting the bucket on the cage when it has reached a definite elevation consisting of a grooved part secured to the bucket to one side of the axis of its pivots, and an obstruction secured to the framework of the elevator adapted to enter the grooved part to rock the bucket.

2. In an elevator, the combination of upright guides, a cage, hoisting devices for raising and lowering the cage, a bucket pivoted to the cage, and means for automatically tilting the bucket on the cage when it has reached adefinite elevation consisting of a grooved part secured to the bucket to one side of the axis of its pivots and having its rear wall ex- "devices for raising and lowering the frame, a

support for merchandise or materials hinged to the frame and adapted to be oscillated for automatically discharging its contents, and

an automatic tilting device for tilting the support first in one direction to dump and then in the other to right it consisting of a grooved part secured to the support to one side of the axis of its hinge and having its rear wall extended beyond the forward wall and an obstruction secured to the framework of the elevator adapted to enter the grooved part to rock the support and strike the extended Wall to right the support when the frame is lowered.

4. In an elevator, the combination of upright guides, a frame guided thereon, hoisting devices for raising and lowering the frame, a support for merchandise or materials hinged to the frame and adapted to be oscillated for automatically discharging its contents, means to hold the support normally in a position to sustain its contents except at a definite position in the path of the frame on the upright guides, and automatic tilting devices for tilting the support first in one direction to dump and then in the other to right it consisting of a grooved part secured to the support to one side of the axis of its hinge and having its rear wall extended beyond the forward wall and an obstruction secured to the framework of the elevator adapted to enter the grooved part to rock the support and strike the extended wall to right the support when the frame is lowered.

In testimony of which invention I hereunto set my hand.

WILLIAM H. HULTGREN.

Witnesses:

R. I. HUNTER, R. M. KELLY. 

